Racing Ultralight Rear Brake Rotor for Panigale V4 Save weight and reduce the rotational mass while improving on the looks of your motorcycle with these ultralight rear rotors from MM Racing of Canada. Not to be confused by cheap replicas, and other brands such a Mikey Moto, these are MM Racing branded rotors. Reducing the unsprung weight of the motorcycle will have positive effects on handling, acceleration/braking and it will also reduce the parasitic loss of power to the rear wheel. High carbon content steel and heat treated for strength, these rotors are a direct replacement of your rear rotor. Weighs only 390grams (0.86lbs) Available with optional Proti Fully F